Ask Honest John

Most recently answered technical issues questions
I'm losing power with four people in the car - could you tell me what might be causing this? Could it be an MOT fail?
Is it illegal to de-cat a 2002 diesel Freelander TD4?
I have recently bought a second hand Golf with full VW history and have had nothing but problems. First of all, I have experienced juddering from the auto gearbox. VW carried out tests and determined...
I have a 2002 Vectra 2.2 SRI 150. The previous owner had replaced middle box of exauhst with a straight through pipe so I had to replace the cat after a month, because he stuck gunk on instead of replacing...
One cylinder on my 02 Mondeo is not firing. The garage replaced the coil pack, plugs leads, injectors and rail and they've done a compression test. The same cylinder that wasn't running before this still...
My new Panda cuts out heavily under hard acceleration in bottom gear. It could be traction control but if so it cuts in early and hard and is verging on unsafe when pulling smartly out of junctions. I...
I have recently bought a Vauxhall Meriva second hand. So far the car is good. Yesterday I had an EPS fault show on my dash and the steering wheel become stiff. It was difficult to move the steering wheel....
My 2006 diesel Transit was running OK, then I stopped driving, left it a couple of days and now it will not start. Has the fault code P1361. I have had the EDC unit on, the fuel pump checked out ok, swapped...
I have an Audi A4 2.6 and it has done 207,000miles. I had been fine for ages but over the last 500 miles it's got a problem with revving up to 1500rpm on start up. Then it was reving 1500 to 1800 and bobbing...
When reaching 3500 rpm the engine starts to stutter in my Astra 2.0 Turbo and it will not rev any further. What could be the problem?